The way to attract Linux users is to tempt them away from their Thinkpads. The way to do that is to offer a laptop with a trackpoint, this little red dot:
The appeal is that your fingers don't ever need to leave the homerow and also working from your lap on a bus for example is much easier since your hand doesn't have room to move to get to the trackpad
[0] It kills my wrists on pretty much any laptop that's placed in a reasonable position with respect to my eyeline. It's a bit easier on a well-designed keyboard but still not something I'd consider natural.